Drop-box mechanism for looms



4 Sheets-Sheet'. 1.

(No Model.)

H. P. MALLISON. DROP BOX MBGHANISM POR LooMs.

Patented July 12, 1892.

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(No Model.) 4 Sheets-Sheet 2.

H. P. MA'LLISON. 'DRoP B0X MECHANISM PoR LooMs.

No. 478,621. Patented July 12, 1892.

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H. P. MALLISON. DROP BOX MBGHANISM POR LOOMS.

Patented July 12, 189,2.

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' H. P. MALLISON. DROP BOX MEGHANISM FR LOOMS.

No. 478,621. Patented July 12, 1892.

UNITED STATES PATENT OFFICE.

HARVEY P. MALLIsoN, oF PHILADELPHIA, PENNSYLVANIA.

DROP-BOXv IVIECHANISIVI .FOR LONIS.

SPECIFICATION forming part of Letters Patent No. 478,621, dated July 12, 1892.

Application ined Jun/15, 1891.

To all whom it may concernY n Be it known that I, HARVEY P. MALLIsoN, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Drop-Box Mechanisms for Looms, of which the followingis a specification.

The object of my invention is to construct a positive and eective drop-box mechanism for looms; and this object I attain in the following manner, reference being had to the accompanying drawings, in Which- Figure l is a side View of my improved drop-box mechanism, showing the side frame of the loom by dotted lines. Fig. 2 is an end View looking in the direction of the arrow, Fig. 1,the frame of the loom being shown partly in section and partly in dotted lines. Fig. 3 is a side View of a portion of the mechanism, drawn to a larger scale than Fig. l. Fig. 4 is avertical section on the line l 2, Fig. 5. Fig. 5 is a transverse section on the line 3 4, Fig. 3. Fig. 6 is a transverse section on the line 5 6, Fig. 3. Fig. '7 is asectional plan View on the line 7 8, Fig. 5. Fig. S is a sectional plan View on the line 9 l0, Fig.r3; and Figs. 9, 10, and 1l are diagrams illustrating the mechanism in the different positions.

A is the frame of the loom, and B is the lathe, hung in any suitable manner to said frame.

C is the pattern-chain on the pattern-shaft c, which is adapted to bearings on the loomframe, and acted on by this pattern-chain are levers c', connected to bell-crank levers c2 by cords c3. The bell-crank levers c2 are in turn connected, respectively, to bell-crank levers a a' by cords c4 c5, Figs. l and 4.

The pattern mechanism is that commonly used on the class of looms to which Iny invention relates, and therefore need not be described in detail. I may say, however, that the bell-crank levers a a govern Athe shift of the'drop-boxes through the medium of the mechanism described hereinafter in accordance with the dictation of the drop-box pattern-chain C.' D is the main cam-shaft of the loom, geared to a shaft D' by an elliptic gear d and an eccentric gear d, and on the end of the shaft D is a crank D2, in the present instance in the form of a disk, having a crank-pin d2,

l7" for the pivot J.

salia no .seaea or@ man.)

which is -connected to a projection E' on a slide E by a rod D3, so that the slide E reciprocates in proper time as the shaft D rotates. The slide E is constructed in the manner shown in Figs. 4 and 5 and is guided on bearings F, which project from a frame F', having standards secured to the base of the loom. Pinsfin the bearings F pass through slots e in the flanges e on the slide E, so as to prevent the slide from moving sidewisc from the bearings.

Pivoted at g to the slide E is a rack-frame G, which engages with a pinion h on a hollow shaft'H, mounted upon a stud H2, secured to the back frame F2. The shaft IIis held in proper position on the stud by a screw and washer, the screw passinginto the stud. The hollow shaft II has a head I, in which is aslot t, and adapted to this slot is the securingbolt j for the pivot or crank pin J. A nut on the bolt confines the crank J to the head I. I preferably make the hollow shaft II, the pinion h, and the head Iin one piece, acore being used to form the hollow head. Thephead I is adapted to an adjustable bearing e2, which can be raised or lowered by set-screws e3, which pass through lugs on the front frame F of the machine. The bearing e2 is made adjustable simply for convenience in aligning the several parts in the first instance, and in some cases the bearing may form part of or be rigidly secured to the front frame F.

Pivoted at g' to the slideE is a second rackframe Gr',v similar to the rack-frame G, and adapted to be geared to a pinion h on a shaft Il', which has a head I', this head being adapted to a bearing e2, adjustable by means of set-screws c3, similar to that described in reference t0 the head I. p slot i', to which is adapted. ,the securing-bolt Hung to the pivot J is a link K, and hung to the pivot J isalink K', these links being pivoted to the drop-boX-operating bar L at l Z. The end Z2 of the bar L is connected to the drop-.bo'x-lifting rod bya connecting-rod L', Fig. l.

It will be understood that the mechanism may either operate one set of drop-boxes on one side of the loom or may operateboth sets of drop-boxes, one set on one side of the loom and the other set on the opposite side of the loom, by simply connecting the lifting-rods of The head I' has a IOO the two drop-box mechanisms in any suitable manner. Each head I I is notched at 7c and receives a spring-bolt Ze', which tliusserves to lock the pivots J J in their raised orlowered positions, but permit them to be moved when sufficient force is applied. Each bolt 7.a has a sleeve k2, between which and the bearing for the bolt is a spring k3, Fig. 3. Other appliances may be used for this purpose, however, without departing from my invention, inasmuch as this arrangement forms no part of my invention.

As before remarked, the lifting-levers a a are connected to the pattern-chain levers by cords c4 c5, and the arm a2 of each lever rests against the under side of its rack-frame G Or G', as shown in Fig. 4, when the frames are in their forward position. When either of these levers is actuated, as dictated by the pattern-chain, so as to be raised by its respective springs n or n', it lifts the rack-f rame, so that the rack g2 on the lower portion of said frame will engage with the pinion; but when lthe arm a2 of the lever is drawn downby the action of the pattern-chain the upper rack g2 of the rack-frame falls into gear with the pinion by its own weight; but a spring may be used, if found necessary.

In orderto lock the rack-f rames in either their raised or lowered positions, alug fm is formed on the rack-frame G and a like lug m on the rack-frame G. These lugs have pins or projections which are either below or above a bar M, the bar being in such a position as tohold the lower rack of the rack-frames in engage-ment when the-pins are above the bar, and when the pins are below the bar the upper racks of the rack-frames are held in engagement with the pinions. The bar M has openingsp p', through which` the pins can pass, and this bar M is reciprocated in its slidewa-ys q by a lever M, secured to a rockshaft M2, to which is secured an arm M3, which is held against the cam q on the shaft D by a spring or other well-known means. (See dotted lines, Fig. l.) The'parts are so timed with respect to each other that when the rackframes are to be raised or lowered their pins are opposite the openings pp. Thus the bar M will not interfere with the free vert-ical movement of the rackframes except when the latter are traveling forward or backward. The bar L in the present instance is slotted at Z3, and adapted to this slot is a pin s, projecting from the frame F and having a nut s. rlhis pin and nut confine the bar against lateral motion and prevent it from swaying longitudinally, but at the same time, owing to the slot, permit free vertical motion of the bar. It will be evident that other devices for steadying the bar L may be used', and the steadying-pin need not necessarily be at the center of the bar, as shown,as the slot can be atr either end of the bar, as shown by dotted lines in Fig. 3; but for convenience I prefer to mount the bar in the manner shown in the drawings.

pin j down.

Referring to the diagrams Figs. 9, l0, and ll, the full lines in Fig. 9 show the end Z2 of the bai-L in its lowest position, the crankpin being down and the pin j up. In F1g.

ll the end Z2 of the bar L is atits highest position, the crank-pin j being up and .the In Fig. l() the full lines show both crauk-pinsjj up and the bar L in the higher intermediate position, the dotted lines l in said figure illustrating both crank-pins j j', down and the bar L in the lower intermediate position. Thus it will be seen that by the two sets of racks and pinions the boxes can be moved to four positions.

By increasing the number of rack-frames and pinions a greater number of boxes can be used and the lifts increased.

I claim as my inventionl. The combination, in drop-box mechanism for looms, of the drop-box bar, shafts,.cranked pins on said shafts, connections between said cranked pins and the bar, pinions on the shafts, a slide, mechanism for reciprocating the same, a rack-frame engaging with the pinion on each shaft, said rack-frames being pivoted to the slide, and mechanism for throwing said rack-frames into engagement with the pinions, substantially as described.

2. The combination, in drop-box mechanism for looms, of the drop-box bar, cranked shafts, connections between the cranked shafts and the bar, pinions on said shafts, a slide, mechanisin for reciprocating the saine, rack-frames on said slide adapted to engage with the pinions, mechanism for raising and lowering said rack-frames, and the bar for holding the rackframes in either the raised or lowered positions, substantially as described. g

3. The combination, in drop-box mechanism for looms, of the slide, mechanism .for reciprocating said slide, rack-frames on the slide, having upper a-nd lower sets of teeth, shafts, pinions on said shafts, with which the teeth of the said rack-frames engage, with mechanism for raising and lowering said rack-frames, and connections between said shafts and the drop-boxes, whereby when the shafts are ren volved they will raise or lower the drop-boxes, substantially as described.

4. The combination, in drop-boxes, of a bar connected thereto, shafts having cranked pins, links connecting the said pins to the bar, pinions on said shafts, a slide, mechanism for IOO IOS

IIO

reciprocating the same, rack-frames pivoted y teeth which engage with the pinions, a locking-bar, mechanism for reciprocating the saine, and 'pins on the rack-frames bearing upon said bar, substantially as described.

6. The combination of the drop-boxes, the bar connected thereto, cranked shafts, connections between the cranked shafts and the bar, pinions on said shafts, a slide, mechanism for reciprocating the same, rack-frames pivoted to said slide,'mechanism for raising and lowering said pivoted rack-frames, pins Y on the rack-frames, and a locking-bar having openings for the passage of the pins with mechanism for reciprocating said bar, substantially as described.

7. The combination of the drop-boxes, the bar connected thereto, cranked shafts, connections between the cranked shafts and the banpinions o n said shafts, a slide, pivoted rack-frames on said slide, having upper and lower sets of teeth engaging with the pinions, mechanism for raising andloweringthe rack frames, a driving-shaft, a crank thereon, a connecting-rod connecting the crank to the slide, a locking-bar for locking the rackfrarnes in either the raised or lowered positions, a rock-shaft having an arm engaging with the locking-bar and havinga second arm, and a driving-cam engaging with said arm, substantially as and for the purpose set forth.

8. The combination,in drop-boxes, of abar connected thereto, shafts having cranked portions and pinions, links connecting the cranked portions to the bar, a slide, mechanism for reciprocating the same, rack-bars on said slide, having upper and lower sets of teeth engaging with the pinions, bell-crank levers, springs connected to said levers and tending to raise the rack-bars, pattern-chain, and levers connected to said bell-crank levers and adapted to be operated by the pattern-chain, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HARVEY P. MALLISON;

Vitn esses: l

WILLIAM D. CoNNER, HARRY SMITH. 

